Richard Kell is a designer and craftsman living in the north of England. He is known for designing simple, useful tools such as this: An elegant way of accurately marking out dovetails. One side has a 1:5 slope and the other has a 1:8 slope. The deluxe model (shown) also has a right angle slot so that there is no need to switch back and forth to a square. Solid brass, made in England